Supermonitors

Created by Ian Trevayne during the Fringe Rebellion, the SuperMonitor was an immensly large and powerful warship. This bulk was need:They carried the Devastating Heavy Bombardment Missiles, which has a shockingly large mass. They would be the largest ships built until the Devastators were built during the Human-Arduan Conflict. Even then, they would remain vital, as the Larger vessels were often unable to take part in assualts until the Warp Point had been widened by a Kataswuga Generator. ("Insurrection")

They were the largest hulls that could transit a natural warp point. ("Imperative")